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- W2180109764 abstract "We investigated the relationships between 11 phenological metrics, topographic shade, and anomalous temperature patterns detected using wavelet analysis in seasonal deciduous forests of south Brazil. To obtain the metrics, we applied the TIMESAT algorithm to the enhanced vegetation index EVI from Moderate Resolution Imaging Spectroradiometer MODIS/Terra. MODIS acquires data from the study area under a large seasonal amplitude in the solar zenith angle SZA. We evaluated the effect of topography on phenological metrics by correlating the metrics with shaded relief values. To analyse the inter-annual phenological metric variations with anomalous and regular temperature patterns, we calculated standard anomalies for each metric. Finally, we established relationships between the metrics and the minimum, maximum, and mean temperatures from growing seasons that spanned over 10 seasonal cycles between 2002 and 2012. The correlation results with shaded relief showed that the left LD and right derivative RD, small integral SInt, seasonal amplitude SA, base level BL, and maximum VI value MV were sensitive to topographic effects. The seasonal cycles with the highest temperatures in the growing season 2006/2007 and 2009/2010 exhibited a delay at the end of the cycle and a higher interval of duration and productivity, which was indicated by the positive standard anomalies for end of season EOS, length of season LOS, large integral LInt, and SInt. We observed a different result for the lowest temperature cycle 2003/2004. The means for these metrics in anomalous seasons differed significantly from the metrics of other regular cycles at the 0.05 significance level using paired t-tests. Statistically significant correlations were observed between the metrics and minimum and mean temperature values of the 10 seasonal cycles." @default.
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- W2180109764 date "2015-09-17" @default.
- W2180109764 modified "2023-09-24" @default.
- W2180109764 title "Relationships between MODIS phenological metrics, topographic shade, and anomalous temperature patterns in seasonal deciduous forests of south Brazil" @default.
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- W2180109764 doi "https://doi.org/10.1080/01431161.2015.1084437" @default.
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